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通过田间播期试验、植物培养箱人工光周期和温度试验研究了水稻D I508分蘖角度动态变化特性与光周期和温度的关系.结果表明:不同播期(4月4日、5月5日、6月4日)条件下,大田D I508分蘖角度从半散生到渐趋直立的变化均发生在自然光周期变短(6月21日,夏至)后的10~15 d;在光周期条件下,D I508的分蘖角度同样具有动态变化特性,10 h光照处理可使分蘖角度提前从半散生向直立转变,14 h光照处理则延缓转变.温度处理对水稻分蘖角度的变化特性没有显著影响.
The relationship between photoperiod and temperature and photoperiod of rice D I508 tiller angle was studied by field sowing experiment, artificial light cycle and temperature test of plant incubator.The results showed that the relationship between photoperiod and temperature was significant at different sowing dates (April 4, May 5, June 4), the tillering angles of D I508 in Daejeon field changed from semi-astringent to erect until 10-15 days after natural light period shortened (June 21, summer solstice). Under photoperiodic conditions The tillering angle of D I508 also had the same dynamic change. The tillering angle was advanced from semi-bulk to upright at 10 h illumination, and the transition was delayed at 14 h. Temperature treatment had no significant effect on the tillering angle of rice.